The effect of environment on the gas and the stars of distant galaxies

Yara Jaffe (Universidad de Concepción, Chile)

 

A number of observations have suggested that spiral galaxies transform into S0s by the influence of the environment. It is still unclear however  which mechanism(s) are responsible for such transformation. I will present results from the ESO Distant Cluster Survey (EDisCS), where we have identified changes in galaxy properties with environment up to z~1. In particular, I will discuss the effect of the environment on the (ionized) gas kinematics, the Tully-Fisher relation, and the morphologies of distant star-forming galaxies. Furthermore, I will present recent results from the Blind Ultra Deep HI Environmental Survey (BUDHIES), that has detected HI in hundreds of galaxies in and around two Abell clusters at z~0.2.  This study combines, for the first time, optical properties and HI content at a redshift where evolutionary effects begin to show.